Why Do Mirrors Get Black Edges—And How to Prevent It

Have you noticed a dark, blackened edge forming around your bathroom or vanity mirror? This is called mirror edge deterioration, and it happens when moisture, cleaners, or even steam seep behind the protective backing of the mirror, causing it to corrode over time. Bathrooms are especially prone to this because of constant humidity and cleaning products. Here are some tips on to prevent black edges on mirrors.

Preventative Measures

• Avoid Harsh Cleaners – Use ammonia-free glass cleaners and wipe gently.

• Proper Ventilation – Reduce steam buildup with exhaust fans or open windows.

• Seal the Edges – Protective mirror edge sealants can help prevent moisture intrusion.

• Keep Water Away – Try not to splash or let water sit on the bottom edge of the mirror.

Already Seeing Black Edges?

If your mirror has already started to blacken, don’t worry—replacement isn’t your only option. At Dynamic Glass, we offer custom solutions to cover or frame mirrors, hiding the damaged areas and restoring a clean, stylish look. This allows you to avoid the cost of a full replacement while still upgrading your space.

Protect your mirrors before the damage begins—or let us help you refresh them if it already has. With Dynamic Glass, you have options.